STM32F405xx, STM32F407xx
Symbol
Electrical characteristics
Table 63. Ethernet DC electrical characteristics
Parameter
Min.(1)
Max.(1)
Unit
Input level
VDD
Ethernet operating voltage
2.7
3.6
V
1. All the voltages are measured from the local ground potential.
Table 64 gives the list of Ethernet MAC signals for the SMI (station management interface)
and Figure 47 shows the corresponding timing diagram.
Figure 47. Ethernet SMI timing diagram
tMDC
ETH_MDC
td(MDIO)
ETH_MDIO(O)
tsu(MDIO)
th(MDIO)
ETH_MDIO(I)
MS31384V1
(1)
Table 64. Dynamic characteristics: Ehternet MAC signals for SMI
Symbol
tMDC
Parameter
Min
Typ
Max
Unit
MDC cycle time( 2.38 MHz)
Write data valid time
Read data setup time
Read data hold time
411
6
420
425
Td(MDIO)
tsu(MDIO)
th(MDIO)
10
-
13
-
ns
12
0
-
-
1. Data based on characterization results, not tested in production.
Table 65 gives the list of Ethernet MAC signals for the RMII and Figure 48 shows the
corresponding timing diagram.
Figure 48. Ethernet RMII timing diagram
RMII_REF_CLK
td(TXEN)
td(TXD)
RMII_TX_EN
RMII_TXD[1:0]
tsu(RXD)
tsu(CRS)
tih(RXD)
tih(CRS)
RMII_RXD[1:0]
RMII_CRS_DV
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